Post for drilling-machines.



A.P.DERUY.

POST FOR DRILLING MACHINES.

APPLIUATION FILED MAR. 23, 1912.

Patented Apr. 14, 1914.

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APPLICATION FILED MAILZS, 1912.

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ABDON F. DER-UY, 0F PITTSBURG, KANSAS.

POST FOR DRILLING-MACHINES.

Specification of Letters Patent.

Patented Apr. 14, 1914.

Application filed March 23, 1912. Serial No. 685,760.

To all whom. it may concern:

Be it known that I, ABDoN F. DERUY, a citizen of the United States, and a resident of Pittsburg, in the county of Crawford and State of Kansas, have invented a certain new and useful Improvement in Posts for Drilling-Machines, of which the following is a specification.

This invention relates to posts for drilling machines and one object is to provide a drill post which may be quickly and securely fastened in operative position, and which, when it becomes loosened in the floor or roof of a mine tunnel, due to the operation of the drilling mechanism, may be easily tightened in its position without removal of the post and without interfering with the drilling mechanism supported by the post.

A further object of my invention is to provide a drill post which is adapted to be placed and secured so that the drill supported thereby may be operated close to a wall or in a corner.

My invention provides still further novel mechanism for extending the drill post and holding it securely in the position to which it may be extended.

My invention also provides a structure in which the same crank which is employed to turn the drill bar may be employed to tighten or loosen the post.

My invention also provides a structure by which the operator may without turning the post on its axis easily extend the same or turn the drill bar without changing his position at one side of the post.

Other novel features are hereinafter fully described and claimed.

In the accompanying drawings which illustrate the preferred form of my invention, Figure 1 is a perspective View of the machine. Fig. 2 is a vertical section on the line a?) of Fig. 8. Fig. 3 is an enlarged side elevation of a portion of the post and of the scroll gear. Fig. 4 is a face view of the scroll gear. Fig. 5 is a cross section on the line c-cl of Fig. 3.

Similar reference characters designate similar parts.

The post comprises a standard consisting of two vertical bars 1, like edges of which at one side of the standard are provided with notches 2 adapted to receive trunnions 3 of an internally screw threaded sleeve 4, which constitutes a support for a screw threaded bar 5 to one end of which is secured a drill 6, the other end being squared at 7 for entering a square hole 8 of a crank The lower ends of the bars 1 are secured 111 a block 10 which has secured in it axially a longitudinal pin 11 the lower end of which 1s preferably conical so as to permit pivotal movement of the pin in the floor of a mine tunnel. The other ends of the bars 1 are adjustably secured in a block 12, by means of set screws 12. The block 12 is provided with a transverse bridge portion 13 in which is rotatively mounted at a slight inclination to the horizontal the axial shank 14 of a scroll gear 15. This gear is provided with a convolute rib 16 which meshes with the teeth 17 disposed transversely in a longitudinal row on one side of a member 18, which is longitudinally slidable in the block 12, and has the side opposite the teeth 17 hearing against two transverse bridge portions 19 of the block 12. The outer end of the shank 14 is squared at 20 so as to fit either of the square holes 8 of the crank 9. The upper end of the member 18 is preferably conical, so that said member may pivotally engage the roof of the mine tunnel in which the machine is employed.

The crank 9 is adapted to be detachably mounted on either the shank 14 or the bar 5, and the squared portions 20 and 7 of said shank and bar are, preferably, disposed at the same side of the standard, and at the side opposite the side containing the notches 2, the upper portion 19 having a U-shaped passage and the lower portion having a rectangular opening for receiving said member 18. By reason of this construction, the op erator of the machine may turn the drill bar 5 or the shank 14, as the case may require without changing his position or changing the position of the machine,

Owing to the shank 14 of the scroll gear being disposed laterally, it is always in position for convenient access for the purpose of tightening up the post in case it becomes loosened in the earth or coal during the drilling operation, and the tightening may be effected without disturbing the position of the post or drilling mechanism.

The trunnions 3 are pivotally supported in the notches 2 and the post is pivotally supported in the roof and floor of the tunnel, so that the drill bar may be swung to any position desired, and the apparatus may be employed close to a wall or in a corner.

In operating the invention, the post is set nel. The trunnions 3 may then be placed in notches 2, the crank 9 detached from the shank 14c and applied to the square portion 7v of the drill bar 5, and the drill bar swung with the sleeve 4 to the position in which the drill 6 is to be used. If it is necessary, the post may be turned on the pin 11 and member 18 to bring the drill 6 to the proper position. hen properly positioned the drill 6 may be turned so as to advance by turning the crank 9 which is engaged with the bar 5.

I do not limit my invention to the structure described and shown, as modifications, within the scopeof the appended claim, may be made without departing from the spirit of my invention.

Having thus described my invention, What I claim and desire to secure by Letters Patent, is

An extensible post for drilling machines, comprising a pair of spaced longitudinal bars for supporting a drill bar, means carried by the lower ends of said spaced bars for pivotally engaging the floor of a tunnel, a block adjustably carried by the upper ends of said spaced bars, said block being provided with two vertically spaced cross bars bridging the space between said longitudinal bars, one of said cross bars having a rectangular opening and the other cross bar having a U-shaped passage in alincment with said opening, means for pivotally engaging the roof of a tunnel and having a ratchet shank portion operating between said longitudinal bars and through said opening and passage of said cross bars,

said block being also provided with a bridge portion across the space between said cross bars and on the opposite side of said shank portion from the cross bar having the U- shaped passage, and a scroll gear carried by said bridge portion and adapted to engage Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

